7. Stress test

7. Stress test

Chris Hondros, Getty Images

Ten soldiers boarded a plane at California's Fort Hunter Liggett in the early 1960s, expecting a routine training mission. Instead, once they were airborne, the crew announced that an engine had stalled, the landing gear was inoperable and the plane would attempt to ditch in the ocean. Then the crew issued an odd demand: The soldiers would have to fill out insurance forms. After they dutifully did so, the plane landed, safely and routinely. The episode was an Army experiment to measure soldiers' performance under stress. Not surprisingly, a control group on the ground filled out the same insurance forms more accurately. (Above: An Army soldier fills out a questionaire about mental wellness and health December 15, 2009 at Fort Hamilton Army Garrison in Brooklyn, New York.)

Ten soldiers boarded a plane at California's Fort Hunter Liggett in the early 1960s, expecting a routine training mission. Instead, once they were airborne, the crew announced that an engine had stalled, the landing gear was inoperable and the plane would attempt to ditch in the ocean. Then the crew issued an odd demand: The soldiers would have to fill out insurance forms. After they dutifully did so, the plane landed, safely and routinely. The episode was an Army experiment to measure soldiers' performance under stress. Not surprisingly, a control group on the ground filled out the same insurance forms more accurately. (Above: An Army soldier fills out a questionaire about mental wellness and health December 15, 2009 at Fort Hamilton Army Garrison in Brooklyn, New York.) (Chris Hondros, Getty Images)

Ten soldiers boarded a plane at California's Fort Hunter Liggett in the early 1960s, expecting a routine training mission. Instead, once they were airborne, the crew announced that an engine had stalled, the landing gear was inoperable and the plane would attempt to ditch in the ocean. Then the crew issued an odd demand: The soldiers would have to fill out insurance forms. After they dutifully did so, the plane landed, safely and routinely. The episode was an Army experiment to measure soldiers' performance under stress. Not surprisingly, a control group on the ground filled out the same insurance forms more accurately. (Above: An Army soldier fills out a questionaire about mental wellness and health December 15, 2009 at Fort Hamilton Army Garrison in Brooklyn, New York.)